JP6777408B2 - Building horizontal restoration method and building horizontal restoration structure - Google Patents

Building horizontal restoration method and building horizontal restoration structure Download PDF

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JP6777408B2
JP6777408B2 JP2016051883A JP2016051883A JP6777408B2 JP 6777408 B2 JP6777408 B2 JP 6777408B2 JP 2016051883 A JP2016051883 A JP 2016051883A JP 2016051883 A JP2016051883 A JP 2016051883A JP 6777408 B2 JP6777408 B2 JP 6777408B2
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hole
support pile
casing pipe
building
horizontal restoration
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JP2017166203A (en
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博文 兼村
博文 兼村
基行 池田
基行 池田
公二 三村
公二 三村
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Daiwa House Industry Co Ltd
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Description

この発明は、建物に対する水平修復工法および建物の水平修復構造に関する。 The present invention relates to a horizontal restoration method for a building and a horizontal restoration structure for a building.

不同沈下を生じた建物の水平修復を行うために支持杭を地盤に圧入する工法において、上記支持杭を設ける箇所に擁壁の底盤が存在するために上記支持杭を上記底盤まで入れるだけでは、不同沈下の再発リスクが残る。また、擁壁背面土を撤去し、底盤を露呈させた状態でこの底盤に貫通孔を形成し、この貫通孔から支持杭を圧入するのでは、建物の下支え作業や土留め作業が別途必要になるため、採用できる擁壁高さに制限が生じる。 In the construction method in which the support piles are press-fitted into the ground in order to perform horizontal repair of the building where the uneven settlement has occurred, since the bottom of the retaining wall exists at the place where the support piles are provided, simply inserting the support piles up to the bottom is not enough. The risk of recurrence of uneven settlement remains. In addition, if the soil on the back of the retaining wall is removed, a through hole is formed in the bottom plate with the bottom plate exposed, and a support pile is press-fitted through this through hole, it is necessary to separately support the building and retain the soil. Therefore, there is a limit to the height of the retaining wall that can be adopted.

そこで、これらの欠点がない水平修復工法として、ボーリングマシーンによって地盤に穴部を形成するとともに擁壁の底盤にも貫通孔を形成する工法が考えられる。具体的には、図５（Ａ）および図５（Ｂ）に示すように、地盤１００に擁壁１０１の底盤１０２が存在する場合において、建物の基礎３の側面に沿って地盤１００に掘った掘削穴１７から、ボーリングマシーン５０によって、上記地盤１００および上記底盤１０２を全削孔して、穴部１００ａおよび貫通孔１０２ａを形成する。 Therefore, as a horizontal restoration method that does not have these drawbacks, a method of forming a hole in the ground by a boring machine and also forming a through hole in the bottom of the retaining wall can be considered. Specifically, as shown in FIGS. 5A and 5B, when the bottom 102 of the retaining wall 101 exists in the ground 100, the ground 100 is dug along the side surface of the foundation 3 of the building. From the excavation hole 17, the ground 100 and the bottom 102 are completely drilled by the boring machine 50 to form the hole 100a and the through hole 102a.

次に、図６（Ａ）および図６（Ｂ）に示すように、上記掘削穴１７で露呈されている上記基礎３の下面および側面にかけて取り付けた下部反力取り治具４および上部反力取り治具５に油圧ジャッキ５１を固定する。そして、支持杭２を上記掘削穴１７から上記穴部１００ａ内に入れて上記貫通孔１０２ａに通し、上記油圧ジャッキ５１を用いて上記支持杭２を上記地盤１００に圧入する。そして、この圧入された支持杭２で地盤反力を得るようになってから上記油圧ジャッキ５１を用いて上記基礎３を水平修復する。その後、上記上部反力取り治具５および上記油圧ジャッキ５１を取り外し、圧入された上記支持杭２を上記下部反力取り治具４に接合し、上記掘削穴１７にコンクリートを打設し、上記下部反力取り治具４および支持杭２を、上記基礎３の下部と共に打設コンクートで一体に固定する。 Next, as shown in FIGS. 6 (A) and 6 (B), the lower reaction force removing jig 4 and the upper reaction force removing jig 4 attached to the lower surface and the side surface of the foundation 3 exposed in the excavation hole 17 The hydraulic jack 51 is fixed to the jig 5. Then, the support pile 2 is inserted into the hole 100a from the excavation hole 17 and passed through the through hole 102a, and the support pile 2 is press-fitted into the ground 100 using the hydraulic jack 51. Then, after the ground reaction force is obtained from the press-fitted support pile 2, the foundation 3 is horizontally repaired using the hydraulic jack 51. After that, the upper reaction force removing jig 5 and the hydraulic jack 51 are removed, the press-fitted support pile 2 is joined to the lower reaction force removing jig 4, concrete is poured into the drilling hole 17, and the above. The lower reaction force removing jig 4 and the support pile 2 are integrally fixed together with the lower part of the foundation 3 by a driving concrete.

なお、特許文献１、２に開示の技術は、上記地盤１００に擁壁１０１の底盤１０２が存在する場合に適用されるものではないが、油圧ジャッキを用いて行う水平修復工法について開示している。 The techniques disclosed in Patent Documents 1 and 2 are not applied when the bottom plate 102 of the retaining wall 101 is present in the ground 100, but discloses a horizontal restoration method using a hydraulic jack. ..

特開平９−２６４０３４号公報Japanese Unexamined Patent Publication No. 9-264034 特開２０００−６４３３１号公報Japanese Patent Application Laid-Open No. 2000-64331

しかしながら、上記従来の水平修復工法では、上記ボーリングマシーン５０によって、上記貫通孔１０２ａを形成するときに、一定量掘削ごとに掘削物の排出のための処理を行わなければならず、上記貫通孔１０２ａを形成するのに長時間を要しており、また、このために人件費が増大するという欠点があった。 However, in the conventional horizontal restoration method, when the through hole 102a is formed by the boring machine 50, a process for discharging the excavated material must be performed every fixed amount of excavation, and the through hole 102a must be discharged. It takes a long time to form a tunnel boring machine, and this has the disadvantage of increasing labor costs.

この発明は、上記の事情に鑑み、地盤の支持杭を設ける箇所に擁壁の底盤が存在する場合に、支持杭によって地盤反力を得る状況を効率的に実現できる建物の水平修復工法および建物の水平修復構造を提供することを課題とする。 In view of the above circumstances, the present invention is a horizontal restoration method for a building and a building that can efficiently realize a situation in which a ground reaction force is obtained by a support pile when the bottom of the retaining wall exists at a place where a support pile of the ground is provided. It is an object to provide a horizontal restoration structure of the above.

この発明の水平修復工法は、上記の課題を解決するために、地盤の支持杭を設ける箇所に擁壁の底盤が存在する場合に、上記底盤に形成した貫通孔に支持杭を通し地盤反力を得て建物の基礎を水平修復する工法であって、上記底盤上の地盤に部材を圧入することにより穴部を形成する過程と、上記穴部内にボーリング先端具を挿入し上記底盤に上記貫通孔を形成した後に上記ボーリング先端具を上記穴部から抜き取る過程と、上記穴部内に上記支持杭を挿入し、この支持杭を上記底盤の上記貫通孔に通して上記底盤下の地盤に圧入する過程と、を含むことを特徴とする。 In the horizontal restoration method of the present invention, in order to solve the above-mentioned problems, when the bottom of the retaining wall is present at the place where the support pile of the ground is provided, the support pile is passed through the through hole formed in the bottom base and the ground reaction force is applied. This is a method of horizontally repairing the foundation of a building by obtaining a hole, and the process of forming a hole by press-fitting a member into the ground on the bottom, and inserting a boring tip into the hole to penetrate the bottom. In the process of pulling out the boring tip from the hole after forming the hole, the support pile is inserted into the hole, and the support pile is passed through the through hole of the bottom and press-fitted into the ground under the bottom. It is characterized by including processes.

上記工法においては、上記底盤上の地盤に部材を圧入することにより穴部を形成するので、ボーリングマシーンを用いて地盤に穴部をあけるよりも簡単に穴があけられるようになり、作業効率が向上する。 In the above-mentioned construction method, since a hole is formed by press-fitting a member into the ground on the bottom ground, it becomes easier to make a hole than using a boring machine to make a hole in the ground, and work efficiency is improved. improves.

上記圧入する部材としてケーシング管を用い、このケーシング管を残置して上記穴部をケーシング管穴とするようにしてもよい。これによれば、上記ケーシング管を抜く作業手間を無くせるので、上記ケーシング管の残置による材料コスト増は生じるものの総所要時間をさらに短くし、トータルコストをさらに低減することが可能となる。 A casing pipe may be used as the press-fitting member, and the casing pipe may be left to be used as the casing pipe hole. According to this, since the work of pulling out the casing pipe can be eliminated, the total required time can be further shortened and the total cost can be further reduced, although the material cost is increased due to the remaining casing pipe.

単位長ケーシング管の外径を略内径とする外径管を、上下の単位長ケーシング管同士の繋ぎ部に外嵌して固定することで上記ケーシング管を作製していくようにしてもよい。これによれば、上記ケーシング管の内側に溶接による不所望な突起等が発生するのを防止して、後の支持杭挿入を円滑に行うことができる。 The casing pipe may be manufactured by fitting and fixing an outer diameter pipe having a substantially inner diameter of the outer diameter of the unit length casing pipe to a connecting portion between the upper and lower unit length casing pipes. According to this, it is possible to prevent undesired protrusions and the like due to welding from being generated inside the casing pipe, and to smoothly insert the support pile later.

上記底盤の貫通孔と上記支持杭の外周側との間の空間に、経時固化性を有する充填材を充填するようにしてもよい。これによれば、上記貫通孔の形成で上記底盤中の鉄筋が切断露呈されたような場合でも、この露呈箇所を上記充填材によって覆うことができ、上記鉄筋の防錆を図ることができる。 The space between the through hole of the bottom plate and the outer peripheral side of the support pile may be filled with a filler having a solidifying property over time. According to this, even when the reinforcing bar in the bottom plate is cut and exposed by the formation of the through hole, the exposed portion can be covered with the filler, and the reinforcing bar can be prevented from rusting.

上記底盤の貫通孔の内周側と上記支持杭の外周側との間の空間に、経時固化性を有する充填材を充填するとともに、上記ケーシング管の内周側と上記支持杭の外周側との間の空間にも上記充填材を充填するようにしてもよい。これによれば、上記底盤中の鉄筋の防錆の他、上記底盤の上面側で上記支持杭と上記ケーシング管とが上記充填材によって一体化されて強固になるので、揺れに対する建物基礎部分の耐力向上も図れる。 The space between the inner peripheral side of the through hole of the bottom plate and the outer peripheral side of the support pile is filled with a filler having a solidification property over time, and the inner peripheral side of the casing pipe and the outer peripheral side of the support pile. The space between them may also be filled with the above filler. According to this, in addition to rust prevention of the reinforcing bars in the bottom plate, the support pile and the casing pipe are integrated by the filler on the upper surface side of the bottom plate to be strengthened, so that the building foundation portion against shaking can be used. It is also possible to improve the bearing capacity.

また、この発明の建物の水平修復構造は、地盤の支持杭を設ける箇所に擁壁の底盤が存在しており、上記底盤に形成した貫通孔に支持杭を通し地盤反力を得て建物の基礎を水平修復してなる建物の水平修復構造であって、上記底盤の上側には上記支持杭の周囲にケーシング管が存在することを特徴とする。 Further, in the horizontal restoration structure of the building of the present invention, the bottom of the retaining wall exists at the place where the support pile of the ground is provided, and the support pile is passed through the through hole formed in the bottom base to obtain the ground reaction force of the building. It is a horizontal restoration structure of a building in which the foundation is horizontally restored, and is characterized in that a casing pipe exists around the support pile on the upper side of the bottom plate.

上記の構成であれば、上記底盤の上側においてケーシング管と上記支持杭とからなる二重構造が形成される。このような構造は上記の水平修復工法を用いて効率的に製作することができる。また、上記貫通孔を形成したことで上記底盤中の鉄筋が切断露呈されたような場合でも、上記ケーシング管が存在するので穴部の土が上記露呈箇所に落ちて支持杭に接触することも低減され、上記鉄筋の錆びの発生も低減できる。 With the above configuration, a double structure composed of the casing pipe and the support pile is formed on the upper side of the bottom plate. Such a structure can be efficiently manufactured by using the above horizontal restoration method. Further, even when the reinforcing bar in the bottom plate is cut and exposed by forming the through hole, the soil in the hole may fall to the exposed portion and come into contact with the support pile because the casing pipe is present. It is reduced, and the occurrence of rust on the reinforcing bars can also be reduced.

上記貫通孔と上記支持杭の外周側との間に経時固化性を有する充填材が設けられていてもよい。これによれば、上記貫通孔を形成したことで上記底盤中の鉄筋が切断露呈されたような場合でも、この露呈箇所は上記充填材によって覆われるので、上記鉄筋の防錆等を図ることができる。 A filler having a time-solidifying property may be provided between the through hole and the outer peripheral side of the support pile. According to this, even if the reinforcing bar in the bottom plate is cut and exposed by forming the through hole, the exposed portion is covered with the filler, so that the reinforcing bar can be prevented from rusting. it can.

上記ケーシング管の内周側と上記支持杭の外周側との間にも上記充填材が設けられていてもよい。これによれば、上記底盤の上側で上記支持杭と上記ケーシング管とが上記充填材によって一体化されて強固になるので、横揺れに対する建物基礎部分の耐力向上が図れる。 The filler may also be provided between the inner peripheral side of the casing pipe and the outer peripheral side of the support pile. According to this, since the support pile and the casing pipe are integrated and strengthened by the filler on the upper side of the bottom plate, the yield strength of the building foundation portion against rolling can be improved.

本発明であれば、従来に比べて、建物の水平修復に要する総所要時間が短くて済むことになり、また、この時間短縮によって人件費も低減することができるという効果を奏する。 According to the present invention, the total time required for horizontal restoration of a building can be shortened as compared with the conventional case, and the labor cost can be reduced by this time reduction.

同図（Ａ）は、本発明の実施形態に係る建物の水平修復工法の第１過程を示した説明図であり、同図（Ｂ）は同図（Ａ）の部分拡大図である。FIG. (A) is an explanatory view showing the first process of the horizontal restoration method of the building according to the embodiment of the present invention, and FIG. (B) is a partially enlarged view of FIG. (A). 同図（Ａ）は、本発明の実施形態に係る建物の水平修復工法の第２過程を示した説明図であり、同図（Ｂ）は同図（Ａ）の部分拡大図である。FIG. (A) is an explanatory view showing the second process of the horizontal restoration method of the building according to the embodiment of the present invention, and FIG. (B) is a partially enlarged view of FIG. (A). 同図（Ａ）は、本発明の実施形態に係る建物の水平修復工法の第３過程を示した説明図であり、同図（Ｂ）は同図（Ａ）の部分拡大図である。FIG. (A) is an explanatory view showing a third process of a horizontal restoration method for a building according to an embodiment of the present invention, and FIG. (B) is a partially enlarged view of FIG. (A). 同図（Ａ）は、本発明の実施形態に係る貫通孔内の充填材注入過程を示した説明図であり、同図（Ｂ）はケーシング管内の充填材注入過程を示した説明図である。FIG. (A) is an explanatory view showing a filler injection process in the through hole according to the embodiment of the present invention, and FIG. (B) is an explanatory diagram showing a filler injection process in the casing pipe. .. 同図（Ａ）は、従来の水平修復工法におけるボーリングマシーンによる穴部形成過程を示した説明図であり、同図（Ｂ）は同図（Ａ）の部分拡大図である。FIG. (A) is an explanatory view showing a hole forming process by a boring machine in a conventional horizontal restoration method, and FIG. (B) is a partially enlarged view of FIG. (A). 同図（Ａ）は、従来の水平修復工法における支持杭圧入過程を示した説明図であり、同図（Ｂ）は同図（Ａ）の部分拡大図である。FIG. (A) is an explanatory view showing a support pile press-fitting process in the conventional horizontal restoration method, and FIG. (B) is a partially enlarged view of FIG. (A).

以下、この発明の実施の形態を添付図面に基づいて説明する。
この実施形態にかかる建物の水平修復工法は、地盤の支持杭を設ける箇所に擁壁の底盤が存在する場合に、上記底盤に形成した貫通孔に支持杭を通し地盤反力を得て建物の基礎を水平修復する工法であり、以下に示すように、ケーシング管圧入過程（第１過程）と、底盤穿孔過程（第２過程）と、支持杭圧入過程（第３過程）とを含んでいる。 Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings.
In the horizontal restoration method of a building according to this embodiment, when the bottom of the retaining wall is present at the place where the support pile of the ground is provided, the support pile is passed through the through hole formed in the bottom base to obtain the ground reaction force of the building. It is a construction method for horizontally repairing the foundation, and includes a casing pipe press-fitting process (first process), a bottom plate drilling process (second process), and a supporting pile press-fitting process (third process), as shown below. ..

上記ケーシング管圧入過程（第１過程）では、図１（Ａ）および図１（Ｂ）に示すように、圧入部材として鋼管からなるケーシング管１を地盤１００に圧入してケーシング管穴（穴部）１２を形成する。このケーシング管圧入過程では、例えば、従来技術として示した特許文献２（特開２０００−６４３３１号公報）と同様、下部反力取り治具４、上部反力取り治具５、ジャッキ受け部材６等を備える支持杭圧入基礎水平修復装置を用いることができる。また、このケーシング管圧入過程では、被修復対象となる既設の基礎３がベース部を有する場合、このベース部を基礎３の立上部における支持杭打設側の側面（この実施形態では屋外面）に沿ってはつり作業等で除去する。また、この基礎側面に沿って、地盤１００に掘削穴１７を掘削する。掘削穴１７は、上記下部反力取り治具４を設置可能な程度の深さおよび大きさの穴で良い。 In the casing pipe press-fitting process (first process), as shown in FIGS. 1A and 1B, a casing pipe 1 made of a steel pipe as a press-fitting member is press-fitted into the ground 100 to form a casing pipe hole (hole). ) 12 is formed. In this casing pipe press-fitting process, for example, as in Patent Document 2 (Japanese Unexamined Patent Publication No. 2000-64331) shown as a prior art, the lower reaction force removing jig 4, the upper reaction force removing jig 5, the jack receiving member 6, etc. A support pile press-fitting foundation horizontal repair device can be used. Further, in the casing pipe press-fitting process, when the existing foundation 3 to be repaired has a base portion, the base portion is used as a side surface on the support pile driving side at the rising portion of the foundation 3 (outdoor surface in this embodiment). Remove along the line by fishing work. Further, an excavation hole 17 is excavated in the ground 100 along the side surface of the foundation. The excavation hole 17 may be a hole having a depth and a size capable of installing the lower reaction force removing jig 4.

上記下部反力取り治具４は、側面配置部材４ａの下部にブラケット４ｂを溶接等で接合した側面視で略Ｌ字状をなすものであり、上記ブラケット４ｂが基礎３の下面に当てられ、上記基礎３の側面に上記側面配置部材４ａがケミカルアンカ等の固定具で固定される。 The lower reaction force removing jig 4 has a substantially L-shape when the bracket 4b is joined to the lower portion of the side surface arrangement member 4a by welding or the like, and the bracket 4b is applied to the lower surface of the foundation 3. The side surface arranging member 4a is fixed to the side surface of the foundation 3 with a fixture such as a chemical anchor.

上記側面配置部材４ａには例えばＨ形鋼が用いられ、ブラケット４ｂには長方形断面の角形鋼管または溝形鋼が用いられる。上記側面配置部材４ａには、その基礎当接側の側面に、上記固定具のための挿通孔が設けられ、その上端には、上記上部反力取り治具５と連結するための連結用端板が溶接等により固定される。上記連結用端板には、ボルト挿通孔が形成されている。 For example, H-shaped steel is used for the side surface arrangement member 4a, and a rectangular steel pipe or channel steel having a rectangular cross section is used for the bracket 4b. The side surface arranging member 4a is provided with an insertion hole for the fixture on the side surface on the foundation contact side thereof, and at the upper end thereof, a connecting end for connecting with the upper reaction force removing jig 5. The plate is fixed by welding or the like. A bolt insertion hole is formed in the connecting end plate.

上記上部反力取り治具５は、上記基礎３よりも上方に延びる部材であり、形鋼等の鉄骨材で構成され、下端には上記下部反力取り治具４と連結するための連結部が設けられている。上記連結部を用いて上記下部反力取り治具４の上端に上記上部反力取り治具５の下端を連結するとともに、この上部反力取り治具５を上記基礎３の側面の上部に取り付ける。さらに、上記上部反力取り治具５の上端側にジャッキ受け部材６を取り付ける。 The upper reaction force removing jig 5 is a member extending upward from the foundation 3, is made of a steel frame material such as shaped steel, and has a connecting portion at the lower end for connecting with the lower reaction force removing jig 4. Is provided. The lower end of the upper reaction force removing jig 5 is connected to the upper end of the lower reaction force removing jig 4 by using the connecting portion, and the upper reaction force removing jig 5 is attached to the upper part of the side surface of the foundation 3. .. Further, the jack receiving member 6 is attached to the upper end side of the upper reaction force removing jig 5.

上部反力取り治具５の表面側のフランジには、上記ジャッキ受け部材６を任意高さ位置に取付可能なように、複数の受け部材取付孔が上下に形成されている。また、上部反力取り治具５の裏面のフランジには、複数の基礎取付孔が形成されている。この例では、基礎取付孔は上下に延びる長孔に形成され、上記基礎３に対する取付位置が上下に調整可能とされている。 A plurality of receiving member mounting holes are formed vertically on the flange on the front surface side of the upper reaction force removing jig 5 so that the jack receiving member 6 can be mounted at an arbitrary height position. Further, a plurality of foundation mounting holes are formed in the flange on the back surface of the upper reaction force removing jig 5. In this example, the foundation mounting hole is formed as an elongated hole extending vertically, and the mounting position with respect to the foundation 3 can be adjusted vertically.

なお、屋内用とする上部反力取り治具は、屋外用とする上記上部反力取り治具５に対して高さを低くしたものでよく、その他の構成は屋外用の上部反力取り治具５と同じとすればよい。屋内用とする上部反力取り治具は、例えば床下で作業が必要な場合等に用いられる。 The upper reaction force removing jig for indoor use may have a lower height than the upper reaction force removing jig 5 for outdoor use, and the other configurations may be an outdoor upper reaction force removing jig. It may be the same as the tool 5. The upper reaction force removing jig for indoor use is used, for example, when work is required under the floor.

上記油圧ジャッキ５１を用いて、ケーシング管１を上記底盤１０２の上面または上面付近まで圧入していく。上記ケーシング管１は、例えば、外径が１３９．８ｍｍで長さが１０００ｍｍの単位長ケーシング管１ａを鉛直方向に複数繋げることで作製される。この例では、単位長ケーシング管１ａの外径を略内径とする外径管（スリーブ）１１を、上下の単位長ケーシング管１ａ同士の繋ぎ目部に外嵌し、この外径管１１を単位長ケーシング管１ａに溶接することで上記ケーシング管１を作製している。 Using the hydraulic jack 51, the casing pipe 1 is press-fitted to the upper surface or the vicinity of the upper surface of the bottom plate 102. The casing pipe 1 is manufactured, for example, by connecting a plurality of unit length casing pipes 1a having an outer diameter of 139.8 mm and a length of 1000 mm in the vertical direction. In this example, an outer diameter pipe (sleeve) 11 having an outer diameter of the unit length casing pipe 1a as a substantially inner diameter is fitted onto a joint portion between the upper and lower unit length casing pipes 1a, and the outer diameter pipe 11 is used as a unit. The casing pipe 1 is manufactured by welding to the long casing pipe 1a.

上記ケーシング管１が上記底盤１０２の上面または上面付近まで圧入されることで、上記ケーシング管穴（穴部）１２が形成されたことになるが、この状態では、上記ケーシング管穴１２の底側には、上記底盤１０２から約６００ｍｍ〜７００ｍｍの高さで、地盤１００の土が圧縮されてなるケーシング管内閉塞体Ｂが存在することになる。このような状況下で、上記油圧ジャッキ５１および上記上部反力取り治具５を上記下部反力取り治具４から取り外す一方、上記下部反力取り治具４および上記ケーシング管１は残置し、次の底盤穿孔過程に進む。 When the casing pipe 1 is press-fitted to the upper surface or the vicinity of the upper surface of the bottom plate 102, the casing pipe hole (hole) 12 is formed. In this state, the bottom side of the casing pipe hole 12 is formed. At a height of about 600 mm to 700 mm from the bottom plate 102, there is a casing pipe obstruction body B in which the soil of the ground 100 is compressed. Under such circumstances, the hydraulic jack 51 and the upper reaction force removing jig 5 are removed from the lower reaction force removing jig 4, while the lower reaction force removing jig 4 and the casing pipe 1 are left behind. Proceed to the next bottom drilling process.

底盤穿孔過程（第２過程）では、図２（Ａ）および図２（Ｂ）に示すように、上記地盤１００上にボーリングマシーン５０を設置し、ボーリング先端具（ビット等）５０ａをケーシング管穴１２内に挿入する。ボーリング対象は、上記ケーシング管内閉塞体Ｂと、その下の底盤１０２の部分である。上記ボーリングマシーン５０によって上記ボーリング先端具５０ａを回転させながら降下させていくと、上記ケーシング管内閉塞体Ｂと、その下の底盤１０２の部分が掘削され、底盤１０２には直径が１３０ｍｍ程度の貫通孔１０２ａが形成される。なお、この貫通孔１０２ａの形成に際して、上記底盤１０２においてコンクリートの欠損とともに鉄筋の切断が生じることがある。上記底盤１０２に貫通孔１０２ａが形成されたら、上記ボーリング先端具５０ａを抜き取り、上記ボーリングマシーン５０を撤去する。 In the bottom plate drilling process (second process), as shown in FIGS. 2 (A) and 2 (B), the boring machine 50 is installed on the ground 100, and the boring tip tool (bit or the like) 50a is inserted into the casing pipe hole. Insert into 12. The boring target is the casing pipe closing body B and the bottom plate 102 below it. When the boring tip tool 50a is lowered while being rotated by the boring machine 50, the casing pipe obstruction body B and the portion of the bottom plate 102 below it are excavated, and the bottom plate 102 has a through hole having a diameter of about 130 mm. 102a is formed. In addition, when the through hole 102a is formed, the bottom plate 102 may be damaged and the reinforcing bar may be cut. When the through hole 102a is formed in the bottom plate 102, the boring tip tool 50a is pulled out and the boring machine 50 is removed.

次に、支持杭圧入過程（第３過程）に進む。この支持杭圧入過程では、図３（Ａ）および図３（Ｂ）に示すように、上記ケーシング管穴１２内に支持杭２を挿入する。上記支持杭２は、例えば、外径が８９．１ｍｍ（厚さ４．２ｍｍ）で長さが１０００ｍｍの単位長鋼管２２内に内挿管を挿入して溶接し、鉛直方向に複数繋げることで作製される。上記支持杭２の外周側と上記底盤１０２の貫通孔１０２ａとの間には、略２０ｍｍ程度の厚さの環状空間が形成される。もちろん、このような厚さの環状空間形成に限定されるものではない。上記支持杭２の圧入過程では、上記のケーシング管圧入過程と同様、下部反力取り治具４、上部反力取り治具５、ジャッキ受け部材６等を備える支持杭圧入基礎水平修復装置を用いることができるので、前に取り外した上記上部反力取り治具５および上記油圧ジャッキ５１を上記下部反力取り治具４に再び取り付ける。 Next, the process proceeds to the support pile press-fitting process (third process). In this support pile press-fitting process, the support pile 2 is inserted into the casing pipe hole 12 as shown in FIGS. 3 (A) and 3 (B). The support pile 2 is manufactured, for example, by inserting an intubation pipe into a unit length steel pipe 22 having an outer diameter of 89.1 mm (thickness 4.2 mm) and a length of 1000 mm, welding the pipe, and connecting a plurality of the support piles in the vertical direction. Will be done. An annular space having a thickness of about 20 mm is formed between the outer peripheral side of the support pile 2 and the through hole 102a of the bottom plate 102. Of course, it is not limited to the formation of an annular space having such a thickness. In the press-fitting process of the support pile 2, the support pile press-fitting foundation horizontal repair device including the lower reaction force removing jig 4, the upper reaction force removing jig 5, the jack receiving member 6, etc. is used as in the casing pipe press-fitting process. Therefore, the previously removed upper reaction force removing jig 5 and the hydraulic jack 51 are reattached to the lower reaction force removing jig 4.

上記油圧ジャッキ５１による支持杭２の圧入過程で地盤反力が得られる状態となったら、その支持杭２についての圧入を中断し、基礎３の他の箇所に、上記と同じ方法で支持杭２を圧入していく。もちろん、各支持杭２は、複数個所において同時に圧入しても良いものである。複数設けられる支持杭２において地盤反力が得られる状態となったなら、所定位置の支持杭２について、油圧ジャッキ５１を同時に伸長動作させ、基礎３を、圧入済みの支持杭２で支持して持ち上げる。これにより、地盤１００の沈下等によって傾いていた基礎３を水平にレベル調整して持ち上げることができる。 When the ground reaction force is obtained in the process of press-fitting the support pile 2 by the hydraulic jack 51, the press-fitting of the support pile 2 is interrupted, and the support pile 2 is placed in another part of the foundation 3 by the same method as described above. Is press-fitted. Of course, each support pile 2 may be press-fitted at a plurality of locations at the same time. When the ground reaction force can be obtained from the plurality of support piles 2, the hydraulic jack 51 is simultaneously extended for the support piles 2 at the predetermined positions, and the foundation 3 is supported by the press-fitted support piles 2. lift. As a result, the foundation 3 that has been tilted due to the subsidence of the ground 100 can be horizontally adjusted and lifted.

そして、上記レベル調整が完了したら、上記支持杭２の上端を下部反力取り治具４に接合し、上部反力取り治具５を基礎３から取り外す。支持杭２の下部反力取り治具４への接合は、例えば、金物を介して両者を溶接することにより行う。 Then, when the level adjustment is completed, the upper end of the support pile 2 is joined to the lower reaction force removing jig 4, and the upper reaction force removing jig 5 is removed from the foundation 3. The support pile 2 is joined to the lower reaction force removing jig 4, for example, by welding both of them via a metal fitting.

また、上述したレベル調整の完了後、図４（Ａ）に示すように、上記底盤１０２の貫通孔１０２ａと上記支持杭２の外周側との間の環状空間に、経時固化性を有する充填材Ｃとして、例えば、セメントベントナイト等を充填する。さらに、図４（Ｂ）に示すように、上記ケーシング管１の内周側と上記支持杭２の外周側との間の環状空間にも上記充填材Ｃを充填することができる。 Further, after the above-mentioned level adjustment is completed, as shown in FIG. 4A, a filler having a time-solidifying property is formed in the annular space between the through hole 102a of the bottom plate 102 and the outer peripheral side of the support pile 2. As C, for example, cement bentonite or the like is filled. Further, as shown in FIG. 4B, the filler C can also be filled in the annular space between the inner peripheral side of the casing pipe 1 and the outer peripheral side of the support pile 2.

そして、上記レベル調整の完了後において、上記掘削穴１７にコンクリートを打設し、上記下部反力取り治具４および支持杭２の上端を、上記基礎３の下部と共に、打設した上記コンクリート内に一体に固定する。これにより、水平修復作業が完了する。 Then, after the completion of the level adjustment, concrete is poured into the excavation hole 17, and the upper ends of the lower reaction force removing jig 4 and the support pile 2 are placed together with the lower part of the foundation 3 in the concrete. Fix it integrally with. This completes the horizontal restoration work.

上記工法であれば、上記底盤１０２上の地盤１００に部材（ケーシング管１）を圧入することにより穴部（ケーシング管穴１２）を形成するので、ボーリングマシーンを用いて地盤に穴部をあけるよりも簡単に穴があけられるようになり、作業効率が向上する。また、このような過程および上記穴部内にボーリング先端具５０ａを挿入して上記底盤１０２に貫通孔１０２ａを形成する過程に要する合計時間が、ボーリングマシーン５０を用いて地盤１００と底盤１０２に上記穴部と貫通孔１０２ａを形成するのに要する時間に比べて短くできるので、建物の水平修復の総所要時間が短くて済むことになり、また、この時間短縮によって人件費も低減することができる。 In the above method, a hole (casing pipe hole 12) is formed by press-fitting a member (casing pipe 1) into the ground 100 on the bottom plate 102, so that a hole is formed in the ground using a boring machine. It will be easier to make holes and work efficiency will be improved. Further, the total time required for such a process and the process of inserting the boring tip tool 50a into the hole to form the through hole 102a in the bottom plate 102 is the total time required for the ground 100 and the bottom plate 102 using the boring machine 50. Since the time required to form the portion and the through hole 102a can be shortened, the total time required for horizontal restoration of the building can be shortened, and the labor cost can be reduced by this time reduction.

上記圧入する部材としてケーシング管１を用い、このケーシング管１を残置して上記穴部をケーシング管穴１２とすると、上記ケーシング管１を抜く作業手間を無くせるので、上記ケーシング管１の残置による材料コスト増は生じるものの総所要時間をさらに短くし、トータルコストをさらに低減することが可能となる。 If the casing pipe 1 is used as the press-fitting member and the casing pipe 1 is left behind to form the hole portion as the casing pipe hole 12, the work of pulling out the casing pipe 1 can be eliminated, so that the casing pipe 1 is left behind. Although the material cost increases, the total required time can be further shortened and the total cost can be further reduced.

単位長ケーシング管１ａの外径を略内径とする外径管１１を、上下の単位長ケーシング管１ａ同士の繋ぎ部に外嵌して溶接することで上記ケーシング管１を作製していくようにすると、上記ケーシング管１の内側に溶接による不所望な突起等が発生するのを防止して、後の支持杭挿入を円滑に行うことができる。 The casing pipe 1 is manufactured by fitting and welding an outer diameter pipe 11 having an outer diameter of the unit length casing pipe 1a as a substantially inner diameter to a connecting portion between upper and lower unit length casing pipes 1a. Then, it is possible to prevent an undesired protrusion or the like due to welding from being generated inside the casing pipe 1 and to smoothly insert the support pile later.

上記底盤１０２の貫通孔１０２ａと上記支持杭２の外周側との間の環状空間に、経時固化性を有する充填材Ｃを充填すると、上記貫通孔１０２ａの形成で上記底盤１０２中の鉄筋が切断露呈されたような場合でも、この露呈箇所を上記充填材Ｃによって覆うことができ、上記鉄筋の防錆を図ることができる。この場合、上記穴部が上記ケーシング管穴１２であると、上記貫通孔１０２ａ内に穴部の土が落ちて入るのを防止できるので、上記充填材Ｃを上記貫通孔１０２ａ内に的確に充填することができる。また、上記穴部が上記ケーシング管穴１２であると、このケーシング管穴１２と上記貫通孔１０２ａとの位置関係が正確になり、これにより、上記支持杭２の外周側と上記底盤１０２の貫通孔１０２ａとの間の環状空間も的確に形成できるようになる。 When the annular space between the through hole 102a of the bottom plate 102 and the outer peripheral side of the support pile 2 is filled with the filler C having a solidification property over time, the reinforcing bars in the bottom plate 102 are cut by the formation of the through hole 102a. Even in the case of being exposed, the exposed portion can be covered with the filler C, and the reinforcing bar can be prevented from rusting. In this case, if the hole is the casing pipe hole 12, it is possible to prevent the soil in the hole from falling into the through hole 102a, so that the filler C is accurately filled in the through hole 102a. can do. Further, when the hole portion is the casing pipe hole 12, the positional relationship between the casing pipe hole 12 and the through hole 102a becomes accurate, whereby the outer peripheral side of the support pile 2 and the bottom plate 102 penetrate. An annular space between the hole 102a and the hole 102a can be accurately formed.

上記ケーシング管１の内周側と上記支持杭２の外周側との間の環状空間にも上記充填材Ｃを充填することができ、このようにすると、上記底盤１０２の上面側に存在する上記支持杭２と上記ケーシング管１とが上記充填材Ｃによって一体化されて強固になるので、揺れに対する建物基礎の耐力向上が図れる。 The filler C can also be filled in the annular space between the inner peripheral side of the casing pipe 1 and the outer peripheral side of the support pile 2, and in this way, the filler C present on the upper surface side of the bottom plate 102. Since the support pile 2 and the casing pipe 1 are integrated by the filler C to be strengthened, the strength of the building foundation against shaking can be improved.

また、上記水平修復をしてなる建物の水平修復構造は、地盤の支持杭を設ける箇所に擁壁１０１の底盤１０２が存在しており、上記底盤１０２に鉛直方向に貫通孔１０２ａが形成され、上記支持杭２を上記貫通孔１０２ａに通して地盤反力を得て建物の基礎３を水平修復してなるものであり、上記底盤１０２の上側には上記支持杭２の周囲に上記ケーシング管１が存在するものとなる。 Further, in the horizontal restoration structure of the building to be horizontally restored, the bottom plate 102 of the retaining wall 101 exists at a position where the support piles of the ground are provided, and the bottom plate 102 is formed with a through hole 102a in the vertical direction. The support pile 2 is passed through the through hole 102a to obtain a ground reaction force to horizontally repair the foundation 3 of the building. On the upper side of the bottom plate 102, the casing pipe 1 is formed around the support pile 2. Will exist.

このような水平修復構造であれば、上記底盤１０２の上側においてケーシング管１と上記支持杭２とからなる二重構造が形成される。このような構造は上記の水平修復工法を用いて効率的に製作することができる。また、上記貫通孔１０２ａを形成したことで上記底盤１０２中の鉄筋が切断露呈されたような場合でも、上記ケーシング管１が存在するので穴部の土が上記露呈箇所に落ちて支持杭２に接触することも低減され、上記鉄筋の錆びの発生も低減できる。 With such a horizontal restoration structure, a double structure composed of the casing pipe 1 and the support pile 2 is formed on the upper side of the bottom plate 102. Such a structure can be efficiently manufactured by using the above horizontal restoration method. Further, even when the reinforcing bar in the bottom plate 102 is cut and exposed by forming the through hole 102a, since the casing pipe 1 is present, the soil in the hole falls to the exposed portion and becomes the support pile 2. Contact is also reduced, and the occurrence of rust on the reinforcing bars can be reduced.

また、上記貫通孔１０２ａと上記支持杭２との間に上記経時固化性を有する充填材Ｃが設けられると、上記貫通孔１０２ａを形成したことで上記底盤１０２中の鉄筋が切断露呈されたような場合でも、この露呈箇所は上記充填材Ｃによって覆われるので、上記鉄筋の防錆が図られる。 Further, when the filler C having a solidification property over time is provided between the through hole 102a and the support pile 2, it seems that the reinforcing bar in the bottom plate 102 is cut and exposed by forming the through hole 102a. Even in such a case, since the exposed portion is covered with the filler C, rust prevention of the reinforcing bar can be achieved.

上記ケーシング管１の内周側と上記支持杭２の外周側との間にも上記充填材Ｃが設けられていると、上記底盤１０２の上側で上記支持杭２と上記ケーシング管１とが上記充填材Ｃによって一体化されて強固になるので、横揺れに対する建物基礎の耐力向上が図れる。 When the filler C is also provided between the inner peripheral side of the casing pipe 1 and the outer peripheral side of the support pile 2, the support pile 2 and the casing pipe 1 are placed on the upper side of the bottom plate 102. Since it is integrated and strengthened by the filler C, the strength of the building foundation against rolling can be improved.

上記実施形態では、上記ケーシング管１を抜かないで残置する工法を採用したが、上記ケーシング管１を抜き取る工法を採用してもよいものであり、この場合の穴部は、上記ケーシング管穴１２ではなく、周囲壁が土の穴部となる。 In the above embodiment, the method of leaving the casing pipe 1 without pulling it out is adopted, but the method of pulling out the casing pipe 1 may be adopted, and the hole portion in this case is the casing pipe hole 12 Instead, the surrounding wall becomes a hole in the soil.

以上、図面を参照してこの発明の実施形態を説明したが、この発明は、図示した実施形態のものに限定されない。図示した実施形態に対して、この発明と同一の範囲内において、あるいは均等の範囲内において、種々の修正や変形を加えることが可能である。 Although the embodiments of the present invention have been described above with reference to the drawings, the present invention is not limited to those of the illustrated embodiments. It is possible to make various modifications and modifications to the illustrated embodiment within the same range as the present invention or within the same range.

１ ：ケーシング管
１ａ ：単位長ケーシング管
２ ：支持杭
３ ：基礎
４ ：下部反力取り治具
５ ：上部反力取り治具
６ ：ジャッキ受け部材
１１ ：外径管
１２ ：ケーシング管穴（穴部）
１７ ：掘削穴
５０ ：ボーリングマシーン
５０ａ ：ボーリング先端具
５１ ：油圧ジャッキ
１００ ：地盤
１０１ ：擁壁
１０２ ：底盤
１０２ａ ：貫通孔
Ｂ ：ケーシング管内閉塞体
Ｃ ：充填材 1: Casing pipe 1a: Unit length casing pipe 2: Support pile 3: Foundation 4: Lower reaction force removing jig 5: Upper reaction force removing jig 6: Jack receiving member 11: Outer diameter pipe 12: Casing pipe hole (hole) Department)
17: Drilling hole 50: Boring machine 50a: Boring tip 51: Hydraulic jack 100: Ground 101: Retaining wall 102: Bottom board 102a: Through hole B: Casing pipe blocker C: Filler

Claims (8)

地盤の支持杭を設ける箇所に擁壁の底盤が存在する場合に、上記底盤に形成した貫通孔に支持杭を通し地盤反力を得て建物の基礎を水平修復する工法であって、
上記底盤上の地盤に上記底盤を切削しない管部材を圧入することにより、上記底盤上の地盤に穴部を形成する過程と、
上記管部材内の上記穴部内にボーリング先端具を挿入し上記底盤に上記貫通孔を形成した後に上記ボーリング先端具を上記穴部から抜き取る過程と、
上記管部材内の上記穴部内に上記支持杭を挿入し、この支持杭を上記底盤の上記貫通孔に通して上記底盤下の地盤に圧入する過程と、
を含むことを特徴とする建物の水平修復工法。 When the bottom of the retaining wall exists at the place where the support pile of the ground is provided, the support pile is passed through the through hole formed in the bottom base to obtain the ground reaction force and horizontally repair the foundation of the building.
The process of forming a hole in the ground on the bottom by press-fitting a pipe member that does not cut the bottom into the ground on the bottom .
A process of inserting the boring tip into the hole in the pipe member, forming the through hole in the bottom plate, and then pulling out the boring tip from the hole.
A process of inserting the support pile into the hole portion in the pipe member , passing the support pile through the through hole of the bottom plate, and press-fitting the support pile into the ground under the bottom plate.
A horizontal restoration method for buildings characterized by including. 請求項１に記載の建物の水平修復工法において、上記圧入する管部材としてケーシング管を用い、このケーシング管を残置して上記穴部をケーシング管穴とすることを特徴とする建物の水平修復工法。 The building horizontal restoration method according to claim 1, wherein a casing pipe is used as the press-fitting pipe member, and the casing pipe is left behind to make the hole a casing pipe hole. .. 請求項２に記載の建物の水平修復工法において、単位長ケーシング管の外径を略内径とする外径管を、上下の単位長ケーシング管同士の繋ぎ部に外嵌して固定することで上記ケーシング管を作製していくことを特徴とする建物の水平修復工法。 In the horizontal restoration method for a building according to claim 2, the outer diameter pipe having the outer diameter of the unit length casing pipe as a substantially inner diameter is fitted and fixed to the connecting portion between the upper and lower unit length casing pipes. A horizontal restoration method for buildings, which is characterized by producing casing pipes. 請求項１〜請求項３のいずれか１項に記載の建物の水平修復工法において、上記底盤の貫通孔と上記支持杭の外周側との間の空間に、経時固化性を有する充填材を充填することを特徴とする建物の水平修復工法。 In the horizontal restoration method for a building according to any one of claims 1 to 3, the space between the through hole of the bottom plate and the outer peripheral side of the support pile is filled with a filler having a time-solidifying property. A horizontal restoration method for buildings, which is characterized by the fact that 請求項２または請求項３に記載の建物の水平修復工法において、上記底盤の貫通孔の内周側と上記支持杭の外周側との間の空間に、経時固化性を有する充填材を充填するとともに、上記ケーシング管の内周側と上記支持杭の外周側との間の空間にも上記充填材を充填することを特徴とする建物の水平修復工法。 In the horizontal restoration method for a building according to claim 2 or 3, the space between the inner peripheral side of the through hole of the bottom plate and the outer peripheral side of the support pile is filled with a filler having a time-solidifying property. At the same time, a horizontal restoration method for a building, characterized in that the space between the inner peripheral side of the casing pipe and the outer peripheral side of the support pile is also filled with the filler. 地盤の支持杭を設ける箇所に擁壁の底盤が存在しており、上記底盤に形成した貫通孔に支持杭を通し地盤反力を得て建物の基礎を水平修復してなる建物の水平修復構造であって、上記底盤の上側にのみ上記支持杭の周囲にケーシング管が存在することを特徴とする建物の水平修復構造。 The bottom of the retaining wall exists at the place where the support pile of the ground is provided, and the support pile is passed through the through hole formed in the bottom base to obtain the ground reaction force and the foundation of the building is horizontally repaired. A horizontal restoration structure of a building, characterized in that a casing pipe exists around the support pile only on the upper side of the bottom plate. 請求項６に記載の建物の水平修復構造において、上記貫通孔と上記支持杭の外周側との間に経時固化性を有する充填材が設けられていることを特徴とする建物の水平修復構造。 The horizontal restoration structure of a building according to claim 6, wherein a filler having a time-solidifying property is provided between the through hole and the outer peripheral side of the support pile. 請求項７に記載の建物の水平修復構造において、上記ケーシング管の内周側と上記支持杭の外周側との間にも上記充填材が設けられていることを特徴とする建物の水平修復構造。 In the horizontal restoration structure of the building according to claim 7, the horizontal restoration structure of the building is characterized in that the filler is also provided between the inner peripheral side of the casing pipe and the outer peripheral side of the support pile. ..
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